/Engine/Source/Runtime/Engine/Classes/Kismet/GameplayStatics.h
Overrides the sound class adjuster in the given sound mix. If the sound class does not exist in the input sound mix, the sound class adjuster will be added to the list of active sound mix modifiers.
static void SetSoundMixClassOverride ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, class [USoundMix](API\Runtime\Engine\Sound\USoundMix) * InSoundMixModifier, class [USoundClass](API\Runtime\Engine\Sound\USoundClass) * InSoundClass, float Volume, float Pitch, float FadeInTime, bool bApplyToChildren )